The boy didn't come to ________ life and the method to start his breathing ended up as ________ failure.

A．/；the

B．the；/

C．a；a

D．/；a

引起艾滋病人鹅口疮的病原体是（）

A.巨细胞病毒

B.卡氏肺孢子菌

C.弓形虫

D.念珠菌

E.疱疹病毒